GB2284970B - Frequency spectrum control of received acoustic signal in a telephone set - Google Patents

Frequency spectrum control of received acoustic signal in a telephone set

Info

Publication number
GB2284970B
GB2284970B GB9424669A GB9424669A GB2284970B GB 2284970 B GB2284970 B GB 2284970B GB 9424669 A GB9424669 A GB 9424669A GB 9424669 A GB9424669 A GB 9424669A GB 2284970 B GB2284970 B GB 2284970B
Authority
GB
United Kingdom
Prior art keywords
frequency spectrum
acoustic signal
telephone set
received acoustic
spectrum control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9424669A
Other versions
GB2284970A (en
GB9424669D0 (en
Inventor
Toshio Yoshida
Michitaka Sisido
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of GB9424669D0 publication Critical patent/GB9424669D0/en
Publication of GB2284970A publication Critical patent/GB2284970A/en
Application granted granted Critical
Publication of GB2284970B publication Critical patent/GB2284970B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/087—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
GB9424669A 1993-12-07 1994-12-07 Frequency spectrum control of received acoustic signal in a telephone set Expired - Fee Related GB2284970B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30618993 1993-12-07

Publications (3)

Publication Number Publication Date
GB9424669D0 GB9424669D0 (en) 1995-02-01
GB2284970A GB2284970A (en) 1995-06-21
GB2284970B true GB2284970B (en) 1998-09-09

Family

ID=17954092

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9424669A Expired - Fee Related GB2284970B (en) 1993-12-07 1994-12-07 Frequency spectrum control of received acoustic signal in a telephone set

Country Status (1)

Country Link
GB (1) GB2284970B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07297900A (en) * 1994-04-26 1995-11-10 Mitsubishi Electric Corp Communication equipment taking countermeasure against noise sound
JPH1070425A (en) * 1996-08-27 1998-03-10 Matsushita Electric Ind Co Ltd Telephone set
US6823176B2 (en) * 2002-09-23 2004-11-23 Sony Ericsson Mobile Communications Ab Audio artifact noise masking
EP1501190B1 (en) * 2003-07-24 2009-10-07 Palm, Inc. Method and device for equalization of an audio signal distorted by ambient noise
JP6201949B2 (en) 2014-10-08 2017-09-27 株式会社Ｊｖｃケンウッド Echo cancel device, echo cancel program and echo cancel method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251263A (en) * 1992-05-22 1993-10-05 Andrea Electronics Corporation Adaptive noise cancellation and speech enhancement system and apparatus therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251263A (en) * 1992-05-22 1993-10-05 Andrea Electronics Corporation Adaptive noise cancellation and speech enhancement system and apparatus therefor

Also Published As

Publication number Publication date
GB2284970A (en) 1995-06-21
GB9424669D0 (en) 1995-02-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20031207